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Hi Bhushan<br>
<br>
We ran into this problem whilst doing the Hexagon DSP support in
LLDB. <br>
<br>
This review was up (<a class="moz-txt-link-freetext" href="http://reviews.llvm.org/D4672">http://reviews.llvm.org/D4672</a>) but is now stale
without reviewers. Basically we added the ability to the IR
interpreter to call functions on the target using a threadplan which
manipulated the stack and registers to call functions and capture
any return values, which works well on bare metal without ability to
jit.<br>
<br>
Maybe the patches can be of help to you. I doubt they would apply
cleanly now given the length of time since it was uploaded. It's a
valuable feature, but priorities on the list were elsewhere :)<br>
<br>
Colin<br>
<br>
<br>
<div class="moz-cite-prefix">On 31/03/2015 12:30, Bhushan Attarde
wrote:<br>
</div>
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<div class="WordSection1">
<p class="MsoNormal">Hi,<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">We are debugging a baremetal application
using LLDB which is connected to a remote target (supporting
GDB remote protocol).
<o:p></o:p></p>
<p class="MsoNormal">We are able to execute expressions
involving global and frame variables such as:<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier
New"">(lldb) expr var+4<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">However, LLDB is unable to execute
expressions involving function calls.<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal"><span style="font-family:"Courier
New"">(lldb) expr (int) bar(1,2)<o:p></o:p></span></p>
<p class="MsoNormal"><span style="font-family:"Courier
New"">error: Can't run the expression locally:
Interpreter doesn't handle one of the expression's opcodes<o:p></o:p></span></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Function bar is defined as <span
style="font-family:"Courier New"">
int bar(int, int).</span><o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">The expression execution_policy is set to <span
style="font-family:"Courier New"">
eExecutionPolicyNever</span> as <span
style="font-family:"Courier New"">CanJIT()</span>
returns false for baremetal applications.<o:p></o:p></p>
<p class="MsoNormal">This is because JIT is disabled for static
dynamic loader targets.<o:p></o:p></p>
<p class="MsoNormal">The<span style="font-family:"Courier
New""> IRInterpreter::CanInterpret</span> returns false
as it fails to interpret call instruction (call to 'bar' is
not an intrinsic).
<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">Could you please help us on this?<o:p></o:p></p>
<p class="MsoNormal"><o:p> </o:p></p>
<p class="MsoNormal">-Regards<o:p></o:p></p>
<p class="MsoNormal">Bhushan<o:p></o:p></p>
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<br>
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